Valveless pump



L. SAUSSARD.

VALVELESS PUMP.

APPLiCATION FILED APR. 5, I920.

1 ,4 1 0, 1 29. Patented Mar. 21, 1922.

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VALVELESS PUMP.

APPLICATION FILED APR-5. 1920.

Patented Mar. 21, 1922.

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VALVELESS PUMP.

APPLICATION FILED APR. 5, 1920.

1,41 0, 1 29 Patented Mar. 21, 1922.

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LOUIS SAUSSARD, OF PARIS, FRANCE.

VALVELESS PUMP.

Application filed April 5,

7 '0 all whom it may concern:

Be it known that I, LOUIS SAUSSARD, a citizen of the Republic of France,residing at Paris, Seine Department, No. 4 The de Yarize, in theRepublic of France, engineer, have invented certain new and usefulImprovements in Valveless Pumps, which is fully set forth in thefollowing specification.

The present invention relates to improvements in valveless pumps, and ischiefly applicable to lubrication pumps;

One of the principal features of the invention consists in the fact thatthe intake and delivery are effected by means of the variations involume of a plurality of boxshaped members slidable one within the otherand alongdifferent directions.

The following description and the accompanying drawings are given onlyby way of example.

- Fig. 1 is anelevation of an oil pump according to the invention, withthe cover removed.

Figs. 2 and 3 represent respectively a total vertical section and apartial vertical section of the same pump.

Figs. 4 and 5 represent a vertical section perpendicular to thepreceding, of the same pump considered at two different moments of itsoperation.

Figs. 6 an 7 show vertical sections perpendicular toeach' other, of asecond oil also designed according to the inventlon.

Fig. 8 is ap elevation of the cover of this pump as seen from theinside.

Figs. 9 and 10 are respectively longitudinal and transverse sections ofanother constructional form of the pump according to the invention.

Fig. 11 is a plan view of the top portion of the shaft of this pump.

The oil pump which is represented in the first five figures'consists ofa fixed re'ctan gular box-shaped member 1 having slidable therein withlittle friction a second rectangular member 2 also containing mountedtherein and slidable in a direction perpendicular to the movement of themember 2, a rectangular box-shaped member 3. The outer box-shaped member1 is closed by means of the cover 4.

The interior space of the box 3 lindrical section.

This box member is operated by means of the eccentric 5.

is of cy- Specification of Letters Patent.

Patented Mar. 21, 1922.

1920. Serial No. 311,303.

The intermediate box member 2 contains in its free walls the ports 8,.9, l0 and 11.

The cover plate contains a delivery duct 12 and a suction or intake duct13 which is extended by the duct 14 provided in the box member 1. I Theeccentric contains a duct 16 which is obliquely disposed with referenceto the axis and causes the interior box member 3 to communicaterespectively with the delivery duct 12 and the duct 14.

The outer and intermediate box members are so constructed in such mannerthat each shall contain twospaces, one of which increases in-volumewhile the second decreases in volume. For the spaces whose volumediminishes, the delivery takes place through the duct 15. The pump istherefore of the double-acting type.

At 17, 18, 19 and 20 are represented the various spaces filled with oilwhich are situated at the top and bottom of the box member 2 and to theleft and right of the box member 1.

Supposing the operation to commence while in the position shown in Fig.4, and with the eccentric rotating in the clockwise direction, the pumpwill operate as follows:

During the first quarter of revolution the {box-shaped member 3 willmovedow-nwardly and the box-shaped member 2 to the left. In the spaces17 and 19, delivery takes place through the passages 9, 15, 12 and 6, 8,15, 12, while suction will be effected in the spaces-18 and 20throu'ghthe passages13, 14, 16,11 and 13, 1 1, 16, 10, 7.

Duringthe second quarter of revolution the box-shaped member 3 will moveupwardly and the box-shaped member 2 to the left. 17 and20 through thepassages 13, 14, 16', 9 and-1'3, 14, 16, 10, 7, while delivery takesplace in the spaces 18, 19 through the passages 11, 15,12 and 6, 8, 15,12.

During the third quarter of revolution, the box-shaped member 3 willmove upwardly and the member 2 to the right. Suction takes place in thespaces 17 and 19 through the passages 13, 14, 16, 9 and 13, 14, 16, 8, 6while delivery will be effected in Suction will be effected in'thespaces the spaces 18, 20 through the passages 11,

through the passages 9, 15, 12 and 7, 10, 15, 12, while suction will beeffected in the spaces'18, 19 through the passages 13, 14, 16, 11and'13, 14, 16, 8, 6.

The present pump possesses the following principal advantages. Itsoperation is not of an abrupt nature such as is foun in valve-operatedpumps, and all the spaces are utilized, which allows of obtaining themaximum output. The construction is of a simple character and the pumpwill not get out of adjustment while working.

Figs. 6, 7 and 8 represent an alternative form of-the invention.

In this apparatus the cover piece is provided with two delivery ducts12, which allow of practically effecting for example the delivery of oilto two different operating devicesfsuch for instance as the motor andthe change-speed box, incase the pump is employed upon an automobile.

The eccentric is provided with a duct 21 which during the rotation issuccessively in communication with two slots 22 each of which havingopening therein one of the ducts 12, in such manner that the deliverytakes place successively through these two ducts. Suction or intake iseffected through a right-angled duct 23 disposed centric in order tocause communication between the inner box member 3 and the suction duct13.

The ports 6, 7, 8, 9, 10 and 11 and the spaces 17, 18, 19 and 20 havethe same,

functions as in the foregoing pump.

The operation of these two pumps is also similar. in character.

In the last-described pump, the eccentric has a counter-clockwiserotation.

In the foregoing,,constructional forms, the. disposition of the severalducts does not permit of giving these a sufficient diameter to providefor high outputs. On the contrary, the constructional form representedin Figs-9 to 11 can be realized for a considerable output, and can. beemployed for pumping or compressing air or gas, or in general for allfluids. It also comprises a lubricating device which affords goodpreservation of the working parts, as well as the perfect tightness ofthe joints around the shaft.

In this design of pump, the shaft carrying the operating eccentric isformed of a tube, and is provided next the eccentric with an obliquepartition dividing it into two conduits, one of these being usedfor thesuction and the other for the delivery. This method allows the obtainingof sections of flow which depend only upon the diameter of the shaftitself.

A'fixed .box member 1 contains, slidable therein with little friction, abox member 2 which in turn contains a movable box member 3.

in the ec-- The box member 1 is closed on the one hand by a cover 4. andon the other by a bottom piece 5 containing a delivery duct 6.

A shaft 7 is disposed to rotate in the members 4 and 5*; this shaft ishollow; and at its part 8 adjacent to the cover piece it serves as asuction duct and rotates opposite to an intake conduit 9 fixed upon themember 4 by means of a screw cap 10. In its portion 11 adjacent to thebottom piece 5*, the shaft 7 carries a hole 12 which communicates withthe outside by an orifice 13 in the wall of the shaft. Opposite thishole 12, the bottom piece carries a recess or groove 14 having openinginto it the duct 6*, in such manner that during the rotation of theshaft 7, the recess 12 is always in communication with the delivery.

The duct 6 opens preferably into the rel-' atively large chamber 15* inwhich the impurities are stopped by the fine wire gauze filter 16. 1

' Opposite to the box member'3 the shaft 7 carries an eccentric 17 whichacts during the rotation of the'shaft to produce the requireddisplacements of the box members 2 and 3. i

This eccentric cam is cut out on each side of the longitudinal middleportion 18 for the purpose of effecting communication between theinterior of the shaft 7 and the inside of the box member lateral ports19 and 20 The box member 3 is provided with the ports -21 22 23, and 24*while the box member 2 carries the ports 25 and 26.

- Within the shaft is disposed the oblique partition 27 which cuts offdirect communication between the parts 8 and 11 of the shaft 7 whileallowing the fluid to flow from the part 8" into the chambers formed bythe box members 2 and 3 during the period in which the capacity of thesechambers increases, while it can flow from the said chambers into theportion 11 of the shaft during the period of decrease in the capacity ofthese chambers.

The operatidn of the box members 1, 2 and 3 is the same as in thepreceding case, the intake being effected through 8 and the deliverythrough 12 and 6 This form of pump can be employed for effectin themovement or compression of any fiuld, either liquid or gas. In order toavoid leakage at the delivery end, it is ad-' visable to employ astufling box 28 where the shaft 7 passes through the bottom piece 5. Onthe other hand, at the intake side the air can be prevented fromentering by the use of a very .practical arrangement which will at thesame time provide for the lubrication of the working parts. For thispurpose an oil chamber 29 is provided within the lower part of the boxmembr'l; this 3 through two chamber communicates through a duct 30 withthe bearing which carries the end of the shaft on the intake side. AScrew 31 with pointed end provides a suitable adjustment of the oil flowinto the duct 30,

Moreover, a duct 32 connects the reservoir I, 29 with the recess orgroove 14 and thus allows the oil to flow back into the reservoirinstead of being drawn into the delivery duct.

By this disposition, the oil drawn by suction through the duct 30 isspread over the bearing surfaces of the pump, and a part of the same isdrawn in the direction of the fluid circulation until it is broughtaround the portion of the shaft which traverses the recess 14, whereuponit is projected by centrifugal force against the walls of this recessand then flows downwardly by its own weight to the bottom of the saidrecess. The continuous lubrication of the portion 8 of the shaft willact to prevent all air from entering on this side.

In order to prevent the heating up of the pump, the walls of the boxmember 1 can be made of hollow construction and cooled by a watercirculation.

Without departing from the principle of the invention, the delivery ductcan be disposed along the extension of the shaft, this latter being thenperforated as far as its end which opens into the beginning of the duct,or again, thesh-aft can be extended more or less into the interior ofthe delivery duct or even beyond the latter in order to have mountedthereon a pulley or other operating member.

It is of course understood that instead of causing the shaft and itseccentric to rotate with the stationary box-shaped member, it will bepracticable, without changing the method of operation, to effect therotation of the box-shaped member upon the stationary shaft or again torotate the box member and the shaft in opposite directions.

Claims:

1. A pump containing, in combination, an outer box-shaped member havinga chamber of prismatic form, a second box-shaped member slidable withinthe said chamber and constituting a piston, the interior of this latterchamber having a prismatic form, a third box-shaped member slidablewithin the chamber of the second box-shaped member perpendicularly tothe direction in which the first box-shaped member is guided, theinterior of the second box-shaped member having a circular section, anda shaft provided with an eccentric portion which is adapted to fitwithin the interior of the said second box-shaped members, the saidbox-shaped members havin ducts disposed in their walls for fluid inta eand delivery, and the said shaft also possessing intake and deliveryducts, substantially as described and for the purpose hereinbefore setforth.

2. A pump containing, in combination, an outer box-shaped member havinglateral walls, a box-shaped member slidable within the first box-shapedmember in a single direction, a box-shaped member slidable within thesecond box-shaped member perpendicularly to the direction of movement.of the latter, the interior of the third boxshaped member having acircular section, a shaft provided with a portion which is adapted tofit within the said circular part, the walls of the said box-shapedmembers and the shaft being provided with ducts for fluid intake anddelivery, the intake and delivery ducts within the said shaft beingsituated along the axis of the shaft, and the said shaft having thereinan obliquely-disposed. partition separating the said intake and deliveryducts, the walls of the shaft also containing ports opening on the onehand respectively into the said ducts and on the other hand opening atthe periphery of the said eccentric portion of the shaft, substantiallyas described and for the purpose hereinbefore set forth.

3. A pump containing, in combination, an

outer box-shaped member having a chamber of prismatic form, a secondbox-shaped member slidable within the said chamber and constituting a.piston, the interior of this walls suitable openings having the said, a

shaft journaled'therein, together with ducts for the purpose ofconnecting the said oil chamber with the said ducts, substantially asdescribed and for the purpose hereinbefore set forth.

In testimony, that I claim the foregoing as my invention I have signedmy name in presence of a subscribipig witness.

LO S SAUSSARD.

-Witness 'Maumon Roux.

